Ultrafast photoinduced reaction dynamics of photoactive yellow protein (PYP): Observation of coherent oscillations in the femtosecond fluorescence decay dynamics

Noboru Mataga, Haik Chosrowjan, Yutaka Shibata, Yasushi Imamoto, Mikio Kataoka, Fumio Tokunaga

研究成果: Article査読

44 被引用数 (Scopus)

抄録

We have observed for the first time coherent oscillations in the fs fluorescence (Fl) dynamics of wild-type (w-t) photoactive yellow protein (PYP) and its site-directed mutants. Two oscillatory modes coupled with the ultrafast Fl decay due to the twisting of the excited chromophore were identified, a high frequency mode (∼ 140 cm-1) with 700 fs damping time and a low frequency mode (∼ 50 cm-1) with 500 fs damping time, respectively. The latter becomes overdamped when the structure of the protein nanospace (PNS) surrounding the chromophore becomes more disordered by mutation. Both modes disappear in the F1 dynamics of denatured PYP. Similarities between PYP and rhodopsins (Rh) are discussed.

本文言語English
ページ(範囲)220-225
ページ数6
ジャーナルChemical Physics Letters
352
3-4
DOI
出版ステータスPublished - 2002 1 30
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)
  • 物理化学および理論化学

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